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/*
Language: C-like foundation grammar for C/C++ grammars
Author: Ivan Sagalaev <maniac@softwaremaniacs.org>
Contributors: Evgeny Stepanischev <imbolk@gmail.com>, Zaven Muradyan <megalivoithos@gmail.com>, Roel Deckers <admin@codingcat.nl>, Sam Wu <samsam2310@gmail.com>, Jordi Petit <jordi.petit@gmail.com>, Pieter Vantorre <pietervantorre@gmail.com>, Google Inc. (David Benjamin) <davidben@google.com>

Modified by: firstui
organization: FirstUI(https://www.firstui.cn/)
*/

/* In the future the intention is to split out the C/C++ grammars distinctly
since they are separate languages.  They will likely share a common foundation
though, and this file sets the groundwork for that - so that we get the breaking
change in v10 and don't have to change the requirements again later.
See: https://github.com/highlightjs/highlight.js/issues/2146
*/

import {
	optional
} from '../regex.js'

/** @type LanguageFn */
export default function(hljs) {
	// added for historic reasons because `hljs.C_LINE_COMMENT_MODE` does
	// not include such support nor can we be sure all the grammars depending
	// on it would desire this behavior
	const C_LINE_COMMENT_MODE = hljs.COMMENT('//', '$', {
		contains: [{
			begin: /\\\n/
		}]
	});
	const DECLTYPE_AUTO_RE = 'decltype\\(auto\\)';
	const NAMESPACE_RE = '[a-zA-Z_]\\w*::';
	const TEMPLATE_ARGUMENT_RE = '<[^<>]+>';
	const FUNCTION_TYPE_RE = '(' +
		DECLTYPE_AUTO_RE + '|' +
		optional(NAMESPACE_RE) +
		'[a-zA-Z_]\\w*' + optional(TEMPLATE_ARGUMENT_RE) +
		')';
	const CPP_PRIMITIVE_TYPES = {
		className: 'keyword',
		begin: '\\b[a-z\\d_]*_t\\b'
	};

	// https://en.cppreference.com/w/cpp/language/escape
	// \\ \x \xFF \u2837 \u00323747 \374
	const CHARACTER_ESCAPES = '\\\\(x[0-9A-Fa-f]{2}|u[0-9A-Fa-f]{4,8}|[0-7]{3}|\\S)';
	const STRINGS = {
		className: 'string',
		variants: [{
				begin: '(u8?|U|L)?"',
				end: '"',
				illegal: '\\n',
				contains: [hljs.BACKSLASH_ESCAPE]
			},
			{
				begin: '(u8?|U|L)?\'(' + CHARACTER_ESCAPES + "|.)",
				end: '\'',
				illegal: '.'
			},
			// hljs.END_SAME_AS_BEGIN({
			//   begin: /(?:u8?|U|L)?R"([^()\\ ]{0,16})\(/,
			//   end: /\)([^()\\ ]{0,16})"/
			// })
		]
	};

	const NUMBERS = {
		className: 'number',
		variants: [{
				begin: '\\b(0b[01\']+)'
			},
			{
				begin: '(-?)\\b([\\d\']+(\\.[\\d\']*)?|\\.[\\d\']+)(u|U|l|L|ul|UL|f|F|b|B)'
			},
			{
				begin: '(-?)(\\b0[xX][a-fA-F0-9\']+|(\\b[\\d\']+(\\.[\\d\']*)?|\\.[\\d\']+)([eE][-+]?[\\d\']+)?)'
			}
		],
		relevance: 0
	};

	const PREPROCESSOR = {
		className: 'meta',
		begin: /#\s*[a-z]+\b/,
		end: /$/,
		keywords: {
			'meta-keyword': 'if else elif endif define undef warning error line ' +
				'pragma _Pragma ifdef ifndef include'
		},
		contains: [{
				begin: /\\\n/,
				relevance: 0
			},
			hljs.inherit(STRINGS, {
				className: 'meta-string'
			}),
			{
				className: 'meta-string',
				begin: /<.*?>/,
				end: /$/,
				illegal: '\\n'
			},
			C_LINE_COMMENT_MODE,
			hljs.C_BLOCK_COMMENT_MODE
		]
	};

	const TITLE_MODE = {
		className: 'title',
		begin: optional(NAMESPACE_RE) + hljs.IDENT_RE,
		relevance: 0
	};

	const FUNCTION_TITLE = optional(NAMESPACE_RE) + hljs.IDENT_RE + '\\s*\\(';

	const CPP_KEYWORDS = {
		keyword: 'int float while private char char8_t char16_t char32_t catch import module export virtual operator sizeof ' +
			'dynamic_cast|10 typedef const_cast|10 const for static_cast|10 union namespace ' +
			'unsigned long volatile static protected bool template mutable if public friend ' +
			'do goto auto void enum else break extern using asm case typeid wchar_t ' +
			'short reinterpret_cast|10 default double register explicit signed typename try this ' +
			'switch continue inline delete alignas alignof constexpr consteval constinit decltype ' +
			'concept co_await co_return co_yield requires ' +
			'noexcept static_assert thread_local restrict final override ' +
			'atomic_bool atomic_char atomic_schar ' +
			'atomic_uchar atomic_short atomic_ushort atomic_int atomic_uint atomic_long atomic_ulong atomic_llong ' +
			'atomic_ullong new throw return ' +
			'and and_eq bitand bitor compl not not_eq or or_eq xor xor_eq',
		built_in: 'std string wstring cin cout cerr clog stdin stdout stderr stringstream istringstream ostringstream ' +
			'auto_ptr deque list queue stack vector map set pair bitset multiset multimap unordered_set ' +
			'unordered_map unordered_multiset unordered_multimap priority_queue make_pair array shared_ptr abort terminate abs acos ' +
			'asin atan2 atan calloc ceil cosh cos exit exp fabs floor fmod fprintf fputs free frexp ' +
			'fscanf future isalnum isalpha iscntrl isdigit isgraph islower isprint ispunct isspace isupper ' +
			'isxdigit tolower toupper labs ldexp log10 log malloc realloc memchr memcmp memcpy memset modf pow ' +
			'printf putchar puts scanf sinh sin snprintf sprintf sqrt sscanf strcat strchr strcmp ' +
			'strcpy strcspn strlen strncat strncmp strncpy strpbrk strrchr strspn strstr tanh tan ' +
			'vfprintf vprintf vsprintf endl initializer_list unique_ptr _Bool complex _Complex imaginary _Imaginary',
		literal: 'true false nullptr NULL'
	};

	const EXPRESSION_CONTAINS = [
		PREPROCESSOR,
		CPP_PRIMITIVE_TYPES,
		C_LINE_COMMENT_MODE,
		hljs.C_BLOCK_COMMENT_MODE,
		NUMBERS,
		STRINGS
	];

	const EXPRESSION_CONTEXT = {
		// This mode covers expression context where we can't expect a function
		// definition and shouldn't highlight anything that looks like one:
		// `return some()`, `else if()`, `(x*sum(1, 2))`
		variants: [{
				begin: /=/,
				end: /;/
			},
			{
				begin: /\(/,
				end: /\)/
			},
			{
				beginKeywords: 'new throw return else',
				end: /;/
			}
		],
		keywords: CPP_KEYWORDS,
		contains: EXPRESSION_CONTAINS.concat([{
			begin: /\(/,
			end: /\)/,
			keywords: CPP_KEYWORDS,
			contains: EXPRESSION_CONTAINS.concat(['self']),
			relevance: 0
		}]),
		relevance: 0
	};

	const FUNCTION_DECLARATION = {
		className: 'function',
		begin: '(' + FUNCTION_TYPE_RE + '[\\*&\\s]+)+' + FUNCTION_TITLE,
		returnBegin: true,
		end: /[{;=]/,
		excludeEnd: true,
		keywords: CPP_KEYWORDS,
		illegal: /[^\w\s\*&:<>]/,
		contains: [{ // to prevent it from being confused as the function title
				begin: DECLTYPE_AUTO_RE,
				keywords: CPP_KEYWORDS,
				relevance: 0
			},
			{
				begin: FUNCTION_TITLE,
				returnBegin: true,
				contains: [TITLE_MODE],
				relevance: 0
			},
			{
				className: 'params',
				begin: /\(/,
				end: /\)/,
				keywords: CPP_KEYWORDS,
				relevance: 0,
				contains: [
					C_LINE_COMMENT_MODE,
					hljs.C_BLOCK_COMMENT_MODE,
					STRINGS,
					NUMBERS,
					CPP_PRIMITIVE_TYPES,
					// Count matching parentheses.
					{
						begin: /\(/,
						end: /\)/,
						keywords: CPP_KEYWORDS,
						relevance: 0,
						contains: [
							'self',
							C_LINE_COMMENT_MODE,
							hljs.C_BLOCK_COMMENT_MODE,
							STRINGS,
							NUMBERS,
							CPP_PRIMITIVE_TYPES
						]
					}
				]
			},
			CPP_PRIMITIVE_TYPES,
			C_LINE_COMMENT_MODE,
			hljs.C_BLOCK_COMMENT_MODE,
			PREPROCESSOR
		]
	};

	return {
		aliases: [
			'c',
			'cc',
			'h',
			'c++',
			'h++',
			'hpp',
			'hh',
			'hxx',
			'cxx'
		],
		keywords: CPP_KEYWORDS,
		// the base c-like language will NEVER be auto-detected, rather the
		// derivitives: c, c++, arduino turn auto-detect back on for themselves
		disableAutodetect: true,
		illegal: '</',
		contains: [].concat(
			EXPRESSION_CONTEXT,
			FUNCTION_DECLARATION,
			EXPRESSION_CONTAINS,
			[
				PREPROCESSOR,
				{ // containers: ie, `vector <int> rooms (9);`
					begin: '\\b(deque|list|queue|priority_queue|pair|stack|vector|map|set|bitset|multiset|multimap|unordered_map|unordered_set|unordered_multiset|unordered_multimap|array)\\s*<',
					end: '>',
					keywords: CPP_KEYWORDS,
					contains: [
						'self',
						CPP_PRIMITIVE_TYPES
					]
				},
				{
					begin: hljs.IDENT_RE + '::',
					keywords: CPP_KEYWORDS
				},
				{
					className: 'class',
					beginKeywords: 'enum class struct union',
					end: /[{;:<>=]/,
					contains: [{
							beginKeywords: "final class struct"
						},
						hljs.TITLE_MODE
					]
				}
			]),
		exports: {
			preprocessor: PREPROCESSOR,
			strings: STRINGS,
			keywords: CPP_KEYWORDS
		}
	};
}